/*
 * Copyright (c) Rafael Steil
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * Created on Jan 11, 2005 11:44:06 PM
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.view.forum;

import net.jforum.Command;
import net.jforum.JForumExecutionContext;
import net.jforum.SessionFacade;
import net.jforum.dao.DataAccessDriver;
import net.jforum.dao.KarmaDAO;
import net.jforum.dao.PostDAO;
import net.jforum.entities.Karma;
import net.jforum.entities.KarmaStatus;
import net.jforum.entities.Post;
import net.jforum.repository.PostRepository;
import net.jforum.repository.SecurityRepository;
import net.jforum.security.SecurityConstants;
import net.jforum.util.I18n;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;
import net.jforum.util.preferences.TemplateKeys;
import net.jforum.view.forum.common.PostCommon;
import net.jforum.view.forum.common.ViewCommon;

/**
 * @author Rafael Steil
 * @version $Id$
 */
public class KarmaAction extends Command {
	public void insert() throws Exception {
		if (!SecurityRepository.canAccess(SecurityConstants.PERM_KARMA_ENABLED)) {
			this.error("Karma.featureDisabled", null);
			return;
		}

		int postId = this.request.getIntParameter("post_id");
		int fromUserId = SessionFacade.getUserSession().getUserId();

		PostDAO pm = DataAccessDriver.getInstance().newPostDAO();
		Post p = pm.selectById(postId);

		if (fromUserId == SystemGlobals
				.getIntValue(ConfigKeys.ANONYMOUS_USER_ID)) {
			this.error("Karma.anonymousIsDenied", p);
			return;
		}

		if (p.getUserId() == fromUserId) {
			this.error("Karma.cannotSelfVote", p);
			return;
		}

		KarmaDAO km = DataAccessDriver.getInstance().newKarmaDAO();

		if (!km.userCanAddKarma(fromUserId, postId)) {
			this.error("Karma.alreadyVoted", p);
			return;
		}

		// Check range
		int points = this.request.getIntParameter("points");

		if (points < SystemGlobals.getIntValue(ConfigKeys.KARMA_MIN_POINTS)
				|| points > SystemGlobals
						.getIntValue(ConfigKeys.KARMA_MAX_POINTS)) {
			this.error("Karma.invalidRange", p);
			return;
		}

		Karma karma = new Karma();
		karma.setFromUserId(fromUserId);
		karma.setPostUserId(p.getUserId());
		karma.setPostId(postId);
		karma.setTopicId(p.getTopicId());
		karma.setPoints(points);

		km.addKarma(karma);

		p.setKarma(new KarmaStatus(p.getId(), points));

		if (SystemGlobals.getBoolValue(ConfigKeys.POSTS_CACHE_ENABLED)) {
			PostRepository.update(p.getTopicId(), PostCommon
					.preparePostForDisplay(p));
		}

		JForumExecutionContext.setRedirect(this.urlToTopic(p));
	}

	private void error(String message, Post p) {
		this.setTemplateName(TemplateKeys.KARMA_ERROR);

		if (p != null) {
			this.context.put("message", I18n.getMessage(message,
					new String[] { this.urlToTopic(p) }));
		} else {
			this.context.put("message", I18n.getMessage(message));
		}
	}

	private String urlToTopic(Post p) {
		return JForumExecutionContext.getRequest().getContextPath()
				+ "/posts/list/" + ViewCommon.getStartPage() + "/"
				+ p.getTopicId()
				+ SystemGlobals.getValue(ConfigKeys.SERVLET_EXTENSION) + "#"
				+ p.getId();
	}

	/**
	 * @see net.jforum.Command#list()
	 */
	public void list() throws Exception {
		this.setTemplateName(TemplateKeys.KARMA_LIST);
		this.context.put("message", I18n.getMessage("invalidAction"));
	}

	/**
	 * TODO: Make dynamic data format TODO: refactoring here to remove the
	 * duplicated code with the method above. Performs a search over the users
	 * votes between two dates. FIXME: "order_by" should not come from the HTML
	 * form representing the real db column name
	 * 
	 * @throws Exception
	 */
	/*
	 * public void searchByPeriod() throws Exception { SimpleDateFormat formater =
	 * new SimpleDateFormat("dd/MM/yyyy"); Date firstPeriod, lastPeriod; if
	 * ("".equals(this.request.getParameter("first_date"))) { firstPeriod =
	 * formater.parse("01/01/1970");// extreme date } else { firstPeriod =
	 * formater.parse(this.request.getParameter("first_date")); } if
	 * ("".equals(this.request.getParameter("last_date"))) { lastPeriod = new
	 * Date();// now } else { lastPeriod =
	 * formater.parse(this.request.getParameter("last_date")); }
	 * 
	 * String orderField; if ("".equals(this.request.getParameter("order_by"))) {
	 * orderField = "total"; } else { orderField =
	 * this.request.getParameter("order_by"); }
	 * 
	 * int usersPerPage = SystemGlobals.getIntValue(ConfigKeys.USERS_PER_PAGE); //
	 * Load all users with your karma List users =
	 * DataAccessDriver.getInstance().newKarmaDAO().getMostRatedUserByPeriod(usersPerPage,
	 * firstPeriod, lastPeriod, orderField); this.context.put("users", users);
	 * this.setTemplateName(TemplateKeys.KARMA_SEARCH_BYPERIOD); }
	 */

	/**
	 * FIXME: The date format is not dynamic. FIXME: "order_by" should not come
	 * from the HTML form representing the real db column name
	 * 
	 * Performs a search over the users votes in a specific month.
	 * 
	 * @throws Exception
	 */
	/*
	 * public void searchByMonth() throws Exception { SimpleDateFormat formater =
	 * new SimpleDateFormat("dd/MM/yyyy HH:mm:ss"); int month =
	 * Integer.parseInt(request.getParameter("month")); int year =
	 * Integer.parseInt(request.getParameter("year"));
	 * 
	 * Calendar c = Calendar.getInstance(); Date firstPeriod, lastPeriod;
	 * firstPeriod = formater.parse("01/" + month + "/" + year+ " 00:00:00"); //
	 * set the Calendar with the first day of the month c.setTime(firstPeriod); //
	 * Now get the last day of this month. lastPeriod =
	 * formater.parse(c.getActualMaximum(Calendar.DAY_OF_MONTH) + "/" + month +
	 * "/" + year +" 23:59:59");
	 * 
	 * String orderField; if ("".equals(request.getParameter("order_by")) ||
	 * request.getParameter("order_by") == null) { orderField = "total"; } else {
	 * orderField = this.request.getParameter("order_by"); }
	 * 
	 * int usersPerPage = SystemGlobals.getIntValue(ConfigKeys.USERS_PER_PAGE); //
	 * Load all users with your karma List users =
	 * DataAccessDriver.getInstance().newKarmaDAO().getMostRatedUserByPeriod(usersPerPage,
	 * firstPeriod, lastPeriod, orderField); this.context.put("users", users);
	 * this.setTemplateName(TemplateKeys.KARMA_SEARCH_BYMONTH); }
	 */
}
